Cal may only be twelve years old, but his father has threatened to throw him onto the streets if he doesn’t start earning his keep. Keen to prove himself, he unearths an opportunity through stealthy eavesdropping. Two gentlemen need help transporting an unnamed cargo across the Firth of Forth, no questions asked. Cal is happy to secure the job, but soon discovers that holding up his end will entangle him in a ruthless underworld of thievery, smuggling and body snatchers.